Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Sep. 27, 2015	Sep. 28, 2014
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	$ 31.2
Cumulative undistributed earnings of foreign subsidiaries and equity investees	3,700.0
Tax credit carryforward	18.0
Foreign net operating loss carryforwards	262.2
Gross unrecognized tax benefits	196.9	$ 146.5	$ 150.4	$ 112.7
Unrecognized tax benefits affecting the effective tax rate if recognized	139.5
Interest and penalties expense/(benefit) recognized in income tax expense	5.2	3.6	$ 0.7
Accrued interest and penalties	11.2	$ 7.7
Minimum [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Amount of reasonably possible unrecognized benefit change	$ 42.0